![What lies beneath](https://wp-media.patheos.com/blogs/sites/186/2015/07/560px-Yellowstone_Caldera.svg_.png)
This could be very helpful. And it may offer some reassurance, too:
http://sese.asu.edu/news/creating-stopwatch-volcanic-eruptions
Posted from San Diego, California
This could be very helpful. And it may offer some reassurance, too:
http://sese.asu.edu/news/creating-stopwatch-volcanic-eruptions
Posted from San Diego, California